Yielding joint fob



UNITED STATES PATENT OFFICE.

ROBERT J. BROVN, OF PERRY, PENNSYLVANIA.

YIELDING- JOINT FOR PORTABLE FENCES.

Specification of Letters Patent No.

To all whom fit may concern:

Be it known that I, ROBERT J. BROWN, of Perry, in the county of Venango, in the State Of Pennsylvania, have invented a new and useful Improvement in Portable and Flexible Fences; and I hereby declare that the following is a full, clear, and exact description Of its construction and Operation, reference being had to the accompanying drawings, making part of this specification, in which Figure l is a perspective view of my manner of inserting Zig-Zag or worm fence with bevel posts. Fig. 2 is a top view of the posts, manner of inserting the rail into the post, by means of a` dovetail mortise and tenon and of the orifice in the rail for the insertion of the picket. Fig. 3 exhibits the bevel face of the post, and the form of the mortise. Fig. 4 is a perspective view of ay section of Zig-Zag or worm fence with square posts. Fig. 5 is a top view Of a section of the same and the manner of supporting the posts for a straight fence or gate post.

TO enable Others possessing the requisite skill to make and use my invention I will proceed to describe its construction parts, &C.

My zig-Zag or worm fence consists of bevelcd posts as seen at A A A Fig. l two horizontal rails B, B, B, perpendicular pickets C, C, C.

A A A Fig. 2 is a top or end view of a section of the post.

B B (F ig. 2) exhibits the manner of locking or fastening the rails in the posts by means of a dovetail mortise and tenon.

C Fig. presents the form of the tenon,

A A Fig. 3, shows the form of the mortise-when the fence is made flexible.

fl, cl, Z (Fig. 2) shows the form of the hole in the top of the rail for the picket and the dotted lines c, c, c, exhibit the form of the hole at the bottom of the rail either Oval elliptical or parallel ograms depending upon the shape of the picket used.

This fence is constructed as follows-The bevel posts A A A Fig. l are placed on the surface of the ground at suitable distances apart. The face or gage of the bevel being such that t-he square shoulder of the tenon on the end of therail Fig. Q. B, B, B, when pressed firmly against its sides will give the rail the proper angle as seen in Fig. 2. The tenon o Fig. 2, is inserted in the top or square portion of the mortise A Fig. 8 and is made of such. size and form that when let 16,172, dated December 9, 1856.

down or dropped into the dovetail mortise B below the sides of the tenon will rest on the sides of the mortise and not upon the bottom. The locking together of the post and rail by means of the dovetail tenon and. mortise, the shoulder of the tenon setting firmly upon the bevel face of the post, and the tenon resting upon the sides Of the mortise and not upon the bottom of it render the fence firm and substantial without keys rails or other fastenings.

When it is desired to make the fence fiexible so as to accommodate itself to an uneven surface, the shoulders of the tenon at the end of the rail is beveled each way from the center as exhibited Fig. l e, e. The orifice Or mortise in the rail through which the picket is to pass is on the top side Of the rail made of the same form, and size of the picket to be inserted d, (Z, CZ, Fig. 2, and of an oval Or elliptical form or a parallelogram where square pickets are use, at the bottom side of the rail and half or three fourths of the way through it as seen e, e, e, (Fig. 2). This will permit the posts to be elevated or' depressed as desired and at the same timeV secure the rails and pickets firmly in their place, and leave the posts and pickets standing perpendicular. I also make the same kind of Zig-Zag or worm fence with square` posts as seen in Fig. 4. Fig. 5 also exhibits a top view of the same showing the manner of making the half dovetail mortise and tenon a, a, a. I make similar mortises to those exhibited in Fig. 3. The form of the tenon is shown by (a a a Fig. 5. The shoul`r der of the tenon is made with a gain so as to set the rail at the proper angle. This piece is constructed in every other respect similar to the one above described.

Having thus fully described my improvement what I claim as my invention and desire to secure by Letters Patent isl. The double dovetail mortise and tenon joint of vertical posts, whether of square or triangular scantling, and the rails whether horizontal or inclined at an angle, substantially as herein described.

2. Enlarging the circular or square picket holes of rails on the side facing the picket, in the manner described and for the purposes set forth.

ROBT. J1 BROWN.

Vitnesses C. G. CLARK,

A. HAZELTINE. 

